Application
The M&C flowmeters FM-2K and FM-200K-H
are used in analysis technique to
control gas flow up to an operating temperature
of 180 °C.
Depending on the flowmeter glass tube and
the floating ball out of glass, ranges from 16
l/h to 800 l/h can be realized.
Description
The M&C flowmeters FM-2K and FM-200K-H
consist of a vertical cone shaped glass tube
with a free movable float ball inside. The
sample gas, flowing from the bottom to the
top, lifts the float ball as far as an annular gap
appears between the tube wall and the float
ball and the forces on the ball are compensated.
The position of the float ball is related
to a scale on the flow meter tube.
The FM-2K is a basic heat resistant version
for installation in heated systems.
The electrically heated version FM-200K-H is
equipped with an integrated needle valve
and is fixed on a mounting plate, decoupled
from heat and covered with an insulated
enclosure. The heater consists of a heating
element with high capacity. The temperature
is adjustable on the integrated thermostat up
to 180 °C with high temperature limiter and
low temperature alarm.
The window of the heat insulated enclosure
guarantees a proper reading-out. The electrical
connection box with integrated thermostat
is installed outside the enclosure on the
mounting plate. A flow control is possible
consisting of fibre-optical light guides FO1,
the sensor head FA2-H and the pre-amplifier
K-FA-H which is installed on the mounting
plate as well. The electronic controller FA-1..
(option) has to be mounted externally. – See
data sheet 9.5 –
In order to avoid cold bridges, the connecting
fittings are equally heated by means of
double-ended thermal conducting jaws. The
electrically heated sample lines type 3/4/5-
N/M/H – see data sheet 3.1 – are fixed with
mounting brackets.